On Sat, Aug 2, 2025 at 12:23 PM Timur Kristóf <timur.kris...@gmail.com> wrote: > > Currently when using DC on DCE 6, it produces a page flip timeout > after a suspend/resume. > > After some investigation, it turns out that the issue is because > DC uses different interrupts between DCE 6 and newer HW versions, > and it assumes that the VUPDATE interrupt is always present, when > in fact it's not. It also assumes that the HW is capable of VRR > when a VRR capable monitor is plugged in, when in fact this is > not the case. > > This series marks VRR as unsupported on DCE 6 even when a VRR > capable monitor is plugged in. Furthermore, it fixes the code > trying to access the unregistered VUPDATE interrupt. > > As a side note, I also attempted to actually use the same > interrupts as newer DCE versions, but this didn't work. > Apparently DCE 6 was not advertised with VRR support anyway. > > Finally, there is also a patch to disable fast boot mode > on DCE 6. The rationale is that this already didn't work > on DCE 8, and even if it did I have no means to test it. > > Timur Kristóf (3): > drm/amd/display: Disable fastboot on DCE 6 too. > drm/amd/display: Disable VRR on DCE 6 > drm/amd/display: Don't use non-registered VUPDATE on DCE 6
Series looks good to me, but it would be good to get an ack from the display team as well. Series is: Acked-by: Alex Deucher <alexander.deuc...@amd.com> > > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 26 ++++++++++++------- > .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 16 +++++++----- > drivers/gpu/drm/amd/display/dc/dc_helper.c | 5 ++++ > drivers/gpu/drm/amd/display/dc/dm_services.h | 2 ++ > .../amd/display/dc/hwss/dce110/dce110_hwseq.c | 6 ++--- > 5 files changed, 35 insertions(+), 20 deletions(-) > > -- > 2.50.1 >
